I have Ubuntu 16.04 running on a HP Desktop with two monitors. The launcher is currently located on the left edge of the right hand monitor which is very inconvenient. How do I move it to the left edge of the left monitor?
I am able to move it to the bottom with:
gsettings set com.canonical.Unity.Launcher launcher-position Bottom
But I would like to move it to the left edge of the left monitor.
Go to System Settings > Screen Display
Find Launcher placement and select the display you want to put the launcher on.
Other than that you could personalize your unity interface with Unity Tweak Tool.